Country singer returned offering a few notes maybe (8)
I believe the answer is:
cashback
'a few notes maybe' is the definition.
(notes given back to a customer)
'country singer returned' is the wordplay.
'country singer' becomes 'Cash' (Johnny Cash).
'returned' becomes 'back' (I've seen this in other clues).
'cash'+'back'='CASHBACK'
'offering' acts as a link.
(Other definitions for cashback that I've seen before include "supermarket service" , "Possible bonus" , "Debit card facility" , "means to get extra notes" , "Way of obtaining money at the till" .)